Corroding-house for the manufacture of white lead by the old dutch process



(No Model.)

W. H. WHTHERILL. GORRODING HOUSE PGR THE MANUFAGTURE OF WHITE LEAD BY'THH OLD DUTCH PROCESS.

oooooboooocooooooo ATTORNEYS.

UNITED STATES PATENT OFFICE.

WILLIAM II. WETHERILL, OF PHILADELPHIA, PENNSYLVANIA.

CORRODING-HOUSE FOR THE MANUFACTURE 0F WHITE LEAD BY THE OLD DUTCH PROCESS.

SPECIFICATION forming part of Letters Patent No. 252,823, dated January 24, 1882. Application filed September 29, 1881. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM H. WETE- ERILL, ofthe cityand county of Philadelphia, and State of Pennsylvania, have invented a new and useful Improvement. in the Gonstruction ot' Corroding-Houses, of which thetollowing is a full, clear, and exact description.

My improvements relate to the buildings or houses used in the production ot' lead carbonates by the old Dutch process of corrosion, which houses have heretofore been constructed of' wood, and are expensive both in first cost and in maintenance on account of their rapid decay.

The invention consists inapermanentstr'ucture of stone or brick constructed to facilitate the process, as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure l is a side elevation ofa corrodi'nghouse ofthe improved construction, and Fig. 2 is a vertical section of the same.

rIhe house is made in square form, preferably, of suitable height and size, and the foundations are placed so that the lower portion of theinclosed space is below the ground-level. The sides or walls A are built of brick or stone of suitable thickness, and are sloped on the outside, so as to gradually reduce the thickness toward the top. In two opposite sides openings a are formed for use as passa ge-ways in building up the stack. The sides of these openings a are formed with rabbets on the interior to receive boards b, that are placed to close the passage, and sustain the banking. The rabbets allow wider banking at these necessarily more exposed localities. The foundation is sloped at the bottom of the openings a, as shown at c, so that air may have access below the ground-level. ThewallsAare formed with numerous perforations at suitable distances apart. These are equally distributed, and are of a size to secure ample ventilation. At the center ofthe houseisa Ventilating-flue pipe, d, extendingfroin the Hoor to and through the roof c, and apertured atintervals to allow entrance of heated air to the pipe.

The roofe of the building may be of any suitable construction.

The building constructed as described is less expensive in rst cost than the wooden buildings usually employed, and being indestructible by ordinary use, the expense of repairs is tritling. It is also superior in the respect of maintaining equality of temperature at all seasons of the year, and for that purpose less banking is required between the corroding-pots and the walls, thus giving more available space.

In the process the pots andlead are stacked in the house and banked up with tan in the usual manner. The boardsbare put in as the stack is built up. The slopes c at the base of the openings allow inletofair below the groundlevel to take the place of hot air escaping by ventilator d.

Having thus described my invention, Iclaim as new and desire to secure by Letters Patent- An improved corroding-house having sloping walls of masonry, provided with numerous perforations, and with vertical openings a in two opposite sides, extending from the floor to the roof, and having their inner sides rabbeted to receive the ends ofthe boards b,and provided with a central perforated Ventilatingflue, d, substantially as herein shown and described.

y WILLIAM HENRY WETHERILL. Witnesses:

G. H. WATSON, EDWARD DONAHUE. 

